Adjustable device



oct. 19 i926. Y 1,604,104

S. STLBERG ADJUSTABLE DEVI CE Film1 om. 51, 14923 Inventor: Sv en SLalbe' g.

Patented Oct. `19, 1926.

SVEN STALBERG, Oli' NAHANT, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECL'RC COMPANY, A CORPORATON F NEW' Yltlil'.

ADJUSTABLE DEVICE.

Application filed Gctober 31, 19255. Serial No. @75L-GGD.

My invention relates to adjustable devices, and in particular to adjustable devices especially adapted tor use in connection with light projectors. Among; the objects of my invention are the following: 'llo pro vide a siinplc and rugged adjustable device; to provide an adjustable device comprising; a Swivel inade in two sections, one end ot the swivel arranged to rotate on a bearing and also adapted to receive between the sections a centering element-about which the .swivell is adapted to rotate, the other end ot the swivel being provided with an opening; between the two sections i'or receiwiug` a pivotally supported ineinher adapted to be adjusted about an artis transverse the airis of the swivel; and to provide ineens for drawing the two sections ot the swivel together, tirst.'to clamp the swivel to its bearing and, second, to clainp the adjustable elcinent to the swivel.

The nieans for accomplishing` the forced ing and other useful ends are hereinafter more fully set forth and claiined reference being had to the accompanying sheet et drawings.

Referring more in. detail to the drawings, Fig. 1 shows the projector in elevation and partlyT in section; Fig. 2 is a iront view ot the device with a part broken away to mor clearly show the universal pivot or joint by lneans'ot which the device may he set in any desired position in either or both of two intersecting planes; Fig. 3 is a detail drawing` showing the hinge ot the door ot the device7 in top view; Fig. 4 is a detail draws ing of the latch tor the door; Fig. is a view in perspective oi" an element ot the clamping device of the projector.

Referring` incre in detail to the drawings, the projector is provided with a suitable base 2 between which base andthe casino` il there is located a universal joint having an arrangement controlled by a single thumb screw 4. Projecting upwardly through the central portion of the hase. l provide a swivel pin ineinber 5 which incinber is provided with a hole through which the bolt 4l passes said ineinher 5 serving` as a link for locking the swivel 7 to the base or bearingl element 2. This holt also passes through a lugr 6 which is suitably secured to the casingl 3. The pin 5 is jn'ovided with a cut or groove into which the lugl projects. The rotation ot the lug 6 about the bolt i within the said groove enables the casing; $3 and the projector contained therein to he adjusted in any suitable position, in a vertical plane, 'ifor example, as, ming` thc projector to he standing on a horizontal plane. Furthermore, the universal joint comprises a swivel or clanij'iingiv eleincnt torn'ied in two sections or halves 7' and S. rllhis clamping;` eleinent in its lower part lorlns a hollow tuhelilfe structure, which .lits over the upwardly projecting' stub or eenteriiul element 9 which latter serves as a bearing' for the clainp and into the lower portion oit' which the stub pro` jects, as clearly shown in Fig. Q. lt will also be seen that the bolt l also passes through the two siniilar elements 7 and S suitable holes beinel provided in each ot said ele nicnts. lt willV be understood that the two elements 7 and 8 are sulliciently separated in the Zone where they overlap the plug` 9 to prevent the two elements troni touchingl when the thulnb screw is tightened7 as indi cated by the dotted lines 10. Vilhile the lower portions of the elements and@ encircle the plugl 9, the upper portions do not encircle the lug 6, but lnerely project upwardly along the sides ot' the lug` tl. so that when the thuinh bolt Il istightened7 the faces 11 and 10 ot the elements '7 and 8, respectively, clamp against the :faces 13 and 14, respectively, ot the lug G. This arrangen nient is quite clearly indicated in Fig: 1. lith this construction, by tiglitening` the thumb bolt 4, the eleinents T anc t3 oit' the clamping ineinber are drawn togctl'ier that they are tightened against the stnh 9 ol the lower side and against the lug t on the upper side. In other words.4 a single hand operated clampingl element Ll serves to lock the projector against the horizontal adjustment and also against the vertical adjustment. lt will he understood that the thv-.nih bolt e is provided with threads and at the saine tiine theeleinent S ot the clainp is provided with threads, hoth et which sets of threads engage. The lbolt, however. passes through the element 7 freely. Consemiently, the turning operation oit' the thumb bolt when the projector is to be locked, draws the two sections 7 and@ toward each other.

As shown in the drawings, the lug 6 is suitably secured to the casing 3, as for example. with rivets. The door is fastened to the casing,l 3 by means ci? a hinge 16. In connection with the door a suitable latch 1.7 is also provided for locking the 'door closed. Secured to the frame `of the door is a front glass plate 18. This maybe done in any suitable manner as for example, vby means of clips 19 and screws 20. Tie reflector element 21 which may be of glass or of any other suitable type, is .secured to the casing along` the rim 22 on the front part of the projector. Y This clamping is accomplished through the medium of clips 23 and screws 2li. As shown in the draw ing, the screws pass through the casing` and through the clips 23 and engage a nut on the front side of thel clip 23. This arrangement ofthe screws may be reversed and the head ofthe screw .may be ontlie front side of Vthe clip while the nut 'may be located behind the rim 22 where the head-is now shown. The Arear portion of the frame 3 is perforated and drawn out to receiveA aY tubular-holder 25 in which there is -a suit-- able socket 26 for holding the lamp 27 which constitutes the source of light. With y the arrangement shown after the socket 26 is ingpositionfthe lamp 27 is put inplace through the door 15. f

The socket 26 is secured to the-tube25 in any" suitable manner as for example, it may have a threaded element which passes through the left-hand head of the-tube 25 and it is held in placeby the nut 28. The lamp 27,together withthe socket 26, may beadjusted with respectfto the focal point byY slidingthe tube 25 to theleft or tothe right. 'Fortighte-ning 'the tube 25 inplace, I provide a collar 29'which may be tightened aboutthe neck 30 of the casing Sbv on the other end of theswiveljby Ymeans of the bolt 4:,which element projects between the sections '7 .and 8 .of the swivel. It will be seen that the swivel bearing and centering element have a common vertical shaft and that thefadjustable elemento has a shaft transverse the shaft of the swivel.V Furthermore, the arrangement of the parts Vis such that a plane through the axis of Athe bolt il and perpendiculartothe face-1l of the element -6 will intersect a plane at ht angles to the axis of the bolt et locatedV between the faces 13 and 14 of the element 6, in a line which may be considered Aas a radial axsof .the element 6 extending transverse the axis of the bolt 4. Furtherniore, this radial axis, by rotating` the element 6 about its axis through the boltY 4 will generate a'plane parallel to,^or coin* ciient with, a plane through the swivel axis parallel to the face 18 of the Aadjustable element. e

ltwiil be understood that Ido notwish to limit myself to the construction shown and described inasmuch as modifications will readily -suggestfthemselves to those versed in the art-without departing from the spirit of my invention.

Jhat l claim as new and desire to secure by Letters Patent of the-United States is 1. ln combination, a ring bearing and hollow swivel, Asaid swivel formed in'Vtwo longitudinal sections and mounted'to rotate as a whole on its end on saidbearing, and a cente ing elementp-rojecting into one end of the swivel between said sections, yan adjustable element mounted on the swivel at the other end thereof to `rotate thereon, said element projectingbetween the sections of the swivel.

2. ln combination, a ring bearing Van hollow. swivel, said swivel -formed in two longitudinal sections and mounted to rotate as e V,wlnile onits end on sairdV bearing and a centeringelement"projecting into one end of the swivel between "said sections, an adjustable elementrniounted on the swivel .at the other end thereof; to rotate thereon, said element .projecting-betweenthe sections of the swivel, said. swivel and bearing having a common-axis about which axis' theswivel vis mounted to rotate, the ams of rotation of saidadjustable element beingr transverse the 'axis of rotation-ofthe swivel, said ad- `justableA element having'a radial axis transverse its axis of lrotation and located in a Uplane perpendicular tothe plane of the 

